+++ /dev/null
-# Linux/arm 6.1.5 Kernel Configuration
-
-# Report BUG() conditions and kill the offending process.
-CONFIG_BUG=y
-
-# Make sure kernel page tables have safe permissions.
-CONFIG_STRICT_KERNEL_RWX=y
-
-# Report any dangerous memory permissions (not available on all archs).
-CONFIG_DEBUG_WX=y
-
-# Use -fstack-protector-strong (gcc 4.9+) for best stack canary coverage.
-# Prior to v4.18, these are:
-# CONFIG_CC_STACKPROTECTOR=y
-# CONFIG_CC_STACKPROTECTOR_STRONG=y
-CONFIG_STACKPROTECTOR=y
-CONFIG_STACKPROTECTOR_STRONG=y
-
-# Do not allow direct physical memory access (but if you must have it, at least enable STRICT mode...)
-# CONFIG_DEVMEM is not set
-CONFIG_STRICT_DEVMEM=y
-CONFIG_IO_STRICT_DEVMEM=y
-
-# Provides some protections against SYN flooding.
-CONFIG_SYN_COOKIES=y
-
-# Perform additional validation of various commonly targeted structures.
-CONFIG_DEBUG_CREDENTIALS=y
-CONFIG_DEBUG_NOTIFIERS=y
-CONFIG_DEBUG_LIST=y
-CONFIG_DEBUG_SG=y
-CONFIG_DEBUG_VIRTUAL=y
-CONFIG_BUG_ON_DATA_CORRUPTION=y
-CONFIG_SCHED_STACK_END_CHECK=y
-
-# Provide userspace with seccomp BPF API for syscall attack surface reduction.
-CONFIG_SECCOMP=y
-CONFIG_SECCOMP_FILTER=y
-
-# Make sure line disciplines can't be autoloaded (since v5.1).
-# CONFIG_LDISC_AUTOLOAD is not set
-
-# Provide userspace with ptrace ancestry protections.
-# Make sure that "yama" is also present in the "CONFIG_LSM=yama,..." list.
-CONFIG_SECURITY=y
-CONFIG_SECURITY_YAMA=y
-
-# Provide userspace with Landlock MAC interface.
-# Make sure that "landlock" is also present in the "CONFIG_LSM=landlock,..." list.
-CONFIG_SECURITY_LANDLOCK=y
-
-# Make sure SELinux cannot be disabled trivially.
-# CONFIG_SECURITY_SELINUX_BOOTPARAM is not set
-# CONFIG_SECURITY_SELINUX_DEVELOP is not set
-# CONFIG_SECURITY_WRITABLE_HOOKS is not set
-
-# Enable "lockdown" LSM for bright line between the root user and kernel memory.
-CONFIG_SECURITY_LOCKDOWN_LSM=y
-CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
-CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y
-
-# Perform usercopy bounds checking. (And disable fallback to gain full whitelist enforcement.)
-CONFIG_HARDENED_USERCOPY=y
-# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
-# CONFIG_HARDENED_USERCOPY_PAGESPAN is not set
-
-# Randomize allocator freelists, harden metadata.
-CONFIG_SLAB_FREELIST_RANDOM=y
-CONFIG_SLAB_FREELIST_HARDENED=y
-
-# Randomize high-order page allocation freelist.
-CONFIG_SHUFFLE_PAGE_ALLOCATOR=y
-
-# Allow allocator validation checking to be enabled (see "slub_debug=P" below).
-CONFIG_SLUB_DEBUG=y
-
-# Wipe higher-level memory allocations when they are freed (needs "page_poison=1" command line below).
-# (If you can afford even more performance penalty, leave CONFIG_PAGE_POISONING_NO_SANITY=n)
-CONFIG_PAGE_POISONING=y
-CONFIG_PAGE_POISONING_NO_SANITY=y
-CONFIG_PAGE_POISONING_ZERO=y
-
-# Wipe slab and page allocations (since v5.3)
-# Instead of "slub_debug=P" and "page_poison=1", a single place can control memory allocation wiping now.
-# The init_on_free is only needed if there is concern about minimizing stale data lifetime.
-CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
-CONFIG_INIT_ON_FREE_DEFAULT_ON=y
-
-# Initialize all stack variables on function entry. (Clang and GCC 12+ builds only. For earlier GCC, see CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y below)
-CONFIG_INIT_STACK_ALL_ZERO=y
-
-# Adds guard pages to kernel stacks (not all architectures support this yet).
-CONFIG_VMAP_STACK=y
-
-# Perform extensive checks on reference counting.
-CONFIG_REFCOUNT_FULL=y
-
-# Check for memory copies that might overflow a structure in str*() and mem*() functions both at build-time and run-time.
-CONFIG_FORTIFY_SOURCE=y
-
-# Avoid kernel memory address exposures via dmesg (sets sysctl kernel.dmesg_restrict initial value to 1)
-CONFIG_SECURITY_DMESG_RESTRICT=y
-
-# Enable trapping bounds checking of array indexes (since v5.11). All the other UBSAN checks should be disabled.
-CONFIG_UBSAN=y
-CONFIG_UBSAN_TRAP=y
-CONFIG_UBSAN_BOUNDS=y
-CONFIG_UBSAN_SANITIZE_ALL=y
-# CONFIG_UBSAN_SHIFT is not set
-# CONFIG_UBSAN_DIV_ZERO is not set
-# CONFIG_UBSAN_UNREACHABLE is not set
-# CONFIG_UBSAN_BOOL is not set
-# CONFIG_UBSAN_ENUM is not set
-# CONFIG_UBSAN_ALIGNMENT is not set
-# This is only available on Clang builds, and is likely already enabled if CONFIG_UBSAN_BOUNDS=y is set:
-CONFIG_UBSAN_LOCAL_BOUNDS=y
-
-# Enable sampling-based overflow detection (since v5.12). This is similar to KASAN coverage, but with almost zero runtime overhead.
-CONFIG_KFENCE=y
-
-# Randomize kernel stack offset on syscall entry (since v5.13).
-CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y
-
-# Do not ignore compile-time warnings (since v5.15)
-CONFIG_WERROR=y
-
-# Disable DMA between EFI hand-off and the kernel's IOMMU setup.
-CONFIG_EFI_DISABLE_PCI_DMA=y
-
-# Force IOMMU TLB invalidation so devices will never be able to access stale data contents (or set "iommu.passthrough=0 iommu.strict=1" at boot)
-CONFIG_IOMMU_SUPPORT=y
-CONFIG_IOMMU_DEFAULT_DMA_STRICT=y
-
-# Enable feeding RNG entropy from TPM, if available.
-CONFIG_HW_RANDOM_TPM=y
-
-# Get as much entropy as possible from external sources. The Chacha mixer isn't vulnerable to injected entropy, so even
-# malicious sources should not cause problems.
-CONFIG_RANDOM_TRUST_BOOTLOADER=y
-CONFIG_RANDOM_TRUST_CPU=y
-
-# Make scheduler aware of SMT Cores. Program needs to opt-in to using this feature with prctl(PR_SCHED_CORE).
-CONFIG_SCHED_CORE=y
-
-# Wipe all caller-used registers on exit from the function (reduces available ROP gadgets and
-# minimizes stale data in registers). (Since v5.15)
-CONFIG_ZERO_CALL_USED_REGS=y
-
-# Wipe RAM at reboot via EFI.
-# For more details, see:
-# https://trustedcomputinggroup.org/resource/pc-client-work-group-platform-reset-attack-mitigation-specification/
-# https://bugzilla.redhat.com/show_bug.cgi?id=1532058
-CONFIG_RESET_ATTACK_MITIGATION=y
-
-# This needs userspace support, and will break "regular" distros. See: https://github.com/tych0/huldufolk
-CONFIG_STATIC_USERMODEHELPER=y
-
-# Dangerous; enabling this allows direct physical memory writing.
-# CONFIG_ACPI_CUSTOM_METHOD is not set
-
-# Dangerous; enabling this disables brk ASLR.
-# CONFIG_COMPAT_BRK is not set
-
-# Dangerous; enabling this allows direct kernel memory writing.
-# CONFIG_DEVKMEM is not set
-
-# Dangerous; exposes kernel text image layout.
-# CONFIG_PROC_KCORE is not set
-
-# Dangerous; enabling this disables VDSO ASLR.
-# CONFIG_COMPAT_VDSO is not set
-
-# Dangerous; enabling this allows replacement of running kernel.
-# CONFIG_KEXEC is not set
-
-# Dangerous; enabling this allows replacement of running kernel.
-# CONFIG_HIBERNATION is not set
-
-# Prior to v4.1, assists heap memory attacks; best to keep interface disabled.
-# CONFIG_INET_DIAG is not set
-
-# Easily confused by misconfigured userspace, keep off.
-# CONFIG_BINFMT_MISC is not set
-
-# Use the modern PTY interface (devpts) only.
-# CONFIG_LEGACY_PTYS is not set
-
-# If SELinux can be disabled at runtime, the LSM structures cannot be read-only; keep off.
-# CONFIG_SECURITY_SELINUX_DISABLE is not set
-
-# Reboot devices immediately if kernel experiences an Oops.
-CONFIG_PANIC_ON_OOPS=y
-CONFIG_PANIC_TIMEOUT=-1
-
-# Keep root from altering kernel memory via loadable modules.
-# CONFIG_MODULES is not set
-
-# But if CONFIG_MODULE=y is needed, at least they must be signed with a per-build key.
-CONFIG_STRICT_MODULE_RWX=y
-CONFIG_MODULE_SIG=y
-CONFIG_MODULE_SIG_FORCE=y
-CONFIG_MODULE_SIG_ALL=y
-CONFIG_MODULE_SIG_SHA512=y
-CONFIG_MODULE_SIG_HASH="sha512"
-CONFIG_MODULE_SIG_KEY="certs/signing_key.pem"
-
-# GCC plugins
-
-# Enable GCC Plugins
-CONFIG_GCC_PLUGINS=y
-
-# Gather additional entropy at boot time for systems that may not have appropriate entropy sources.
-CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
-
-# Force all structures to be initialized before they are passed to other functions.
-# When building with GCC:
-CONFIG_GCC_PLUGIN_STRUCTLEAK=y
-CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
-
-# Wipe stack contents on syscall exit (reduces stale data lifetime in stack)
-CONFIG_GCC_PLUGIN_STACKLEAK=y
-# CONFIG_STACKLEAK_METRICS is not set
-# CONFIG_STACKLEAK_RUNTIME_DISABLE is not set
-
-# Randomize the layout of system structures. This may have dramatic performance impact, so
-# use with caution or also use CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE=y
-CONFIG_GCC_PLUGIN_RANDSTRUCT=y
-# CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE is not set
-
-# arm
-
-CONFIG_ARM=y
-
-# Disallow allocating the first 32k of memory (cannot be 64k due to ARM loader).
-CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
-
-# For maximal userspace memory area (and maximum ASLR).
-CONFIG_VMSPLIT_3G=y
-
-# Make sure PXN/PAN emulation is enabled.
-CONFIG_CPU_SW_DOMAIN_PAN=y
-
-# Dangerous; old interfaces and needless additional attack surface.
-# CONFIG_OABI_COMPAT is not set
projects / kconfig-hardened-check.git / blobdiff